www.sentera.eu
MIW-RSMFX-2R-EN-001 - 30 / 03 / 2020
8 - 9
For the complete Modbus register data, refer to the product Modbus Register
Map, which is a separate document attached to the article code on the website
and contains the registers list. Products with earlier firmware versions may not be
compatible with this list.
NOTE
5.
Optional settings
To assure correct communication, the NBT needs to be activated in only two devices
on the Modbus RTU network. If necessary, enable the NBT resistor via 3SModbus or
Sensistant (
Holding register 9
).
Example 1
Example 2
RX
ТX
NBT
NBT
Slave 2
Master
Slave n
Slave 1
Slave 2
Slave 1
RX
ТX
NBT
NBT
Master
Slave n
NOTE
On a Modbus RTU network, two bus terminators (NBTs) need to be activated.
ATTENTION
Do not expose to direct sunlight!
OPERATING INSTRUCTIONS
NOTE
Calibration procedure:
Sensor calibration is not necessary.
In the unlikely event of CO
2
sensor element failure, this component can be replaced.
All sensor elements are calibrated and tested in our factory.
Bootloader
Thanks to the bootloader functionality, the unit firmware can be updated via Modbus
RTU communication. With 3SM boot Application (part of 3SM Center software
suite), ‘boot mode’ is automatically activated and the firmware can be updated.
NOTE
Make sure the power supply does not get interrupted during “bootload” procedure,
otherwise you risk losing unsaved data.
LED indications
1.
When the green LED is on, the measured value (temperature, relative humidity or
CO
2
) is between the minimum and maximum alert range values (
Fig. 5 - 1
).
2.
When the yellow LED is on, the measured value (temperature, relative humidity
or CO
2
) is in the alert range (
Fig. 5 - 2
).
3.
When the red LED is on, the measured value (temperature, relative humidity or
CO
2
) is below the minimum measurement range value or above the maximum
value. Blinking red LED indicates loss of communication with a sensor (
Fig. 5 - 3
).
RSMFX-2R
MULTIFUNCTIONAL
ROOM TRANSMITTER
